Help in figuring out the number of digital outputs in 4-channel input ADC -ADDI7004

Thread Starter

supermankid

Joined May 26, 2013
54
May be some of you have used this ADC ADDI7004(or similar chip) in your design.
I need some help to diagnostic a product containing this chip.
I am trying to understand this ADC like a blackbox(for debugging purpose).
It has 4 input channels and to my surprise 8(pairs) digital output.
I donot see (in block diagram and datasheet) them mentioning if there is a switch to enable those 8 outputs.
I was expecting: either there would be 1(pair) serial output or 4(pair) serial output.
I am not able to understand why are there 8 serial DOUT from 4 Analog input.
Analog block diagram.PNG
 

Sensacell

Joined Jun 19, 2012
2,773
Google LVDS "Low-voltage differential signaling"

It uses a differential pair to move each bit, DOUT0P and DOUT0N for example are a single bit output, a differential pair- the chip outputs 8 bit words over 16 wires.

Lot's of wires, but it's very fast, quiet and can be used over much longer distances.
 
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Thread Starter

supermankid

Joined May 26, 2013
54
Hi Snsacell,

Thanks for your feedback. Does that mean...in this ADC...there is a differential output for each analog input.
i.e. INP_A => DOUT0P and DOUT0N
INM_A => DOUT1P and DOUT1N

Please help me understand this ADC
 
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